Welcome To Mopar1973Man.Com LLC
We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features. Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.
- Replies 24
- Views 4.2k
- Created
- Last Reply
Top Posters In This Topic
-
KATOOM 11 posts -
Mopar1973Man 8 posts -
klcammie 2 posts -
IBMobile 2 posts
Most Popular Posts
-
Testing a BTS 99 Dodge Ram https://www.youtube.com/watch?v=KIuWfd_2LmY
-
Katoom Had the same thing going on with mine. After checking grounds, Batteries and anything else I could think of, with no good results I pulled all wiring from batteries to relays to grid heaters. F
-
The wire was sticking out of the rubber and exposed about 1/4". I pried open the connector and cleaned up the wiring. Then pulled the rubber cover as far back as I could and shoved the connector bac
Featured Replies
Did This Forum Post Help You?
Show the author some love by liking their post!
Welcome To Mopar1973Man.Com LLC
We are privately owned, with access to a professional Diesel Mechanic, who can provide additional support for Dodge Ram Cummins Diesel vehicles. Many detailed information is FREE and available to read. However, in order to interact directly with our Diesel Mechanic, Michael, by phone, via zoom, or as the web-based option, Subscription Plans are offered that will enable these and other features. Go to the Subscription Page and Select a desired plan. At any time you wish to cancel the Subscription, click Subscription Page, select the 'Cancel' button, and it will be canceled. For your convenience, all subscriptions are on auto-renewal.
Over the past couple weeks when I start up during a cold morning I'd happen to get the occasional P1291 code for the lack of intake heat. I'd clear the code and then it wouldn't happen again for a few days or so, depending on how many times I drove the truck. Strange part is when it would throw the code, I'd immediately shut down, check with a reader, clear the code, and start up again. All would be fine. I thought maybe I have a bad or sticky relay that just happened free up, so I checked around to see who has them. Thankfully they're readily available but they're not cheap either.
Before I went and spent the money I thought I'd do a full diagnostic just to be sure..... I checked the small orange and yellow wires for continuity. I checked all the large cables at the solenoid and to the grids and the battery. The only connections that gave me reason for doubt was the small orange and yellow wires which were a tad loose. Their push on springy fitting had the slightest amount of movement in them on the stud as if the springy connector wasn't as tight as it could be. I wiggled them around and tried to smash the spring tighter with my fingers. Not a lot of room down there.....
Then I started the engine and checked everything as the grids cycled. For those who dont already know, both of the grids initially heat up when the WTS light is on and then they alternate as they cycle when the engines idling. Meaning as the engine idles they both dont heat up at the same time but only one grid heats up while the other is off, and they trade during the next cycle.
Nonetheless, everything seemingly works and the code wasnt thrown when performing the diagnostics.
So my question is, has anyone found that their grid heater relays were sticky or worked randomly? I dont live in an area where road salts are used and there is ZERO corrosion on this truck and everything is clean and tight.